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Developing jungle perch fingerling production to improve fishing opportunities Michael Hutchison, Peter Lee, Andrew Norris, David Nixon, David Shorten, Trevor Borchert, Sizhong Wang, Keith Chilcott, Paul Palmer, Tim Marsden, Guy Carton and Les Kowitz March 2016 FRDC Project No. 2012/213 © 2016 Fisheries Research and Development Corporation. All rights reserved. ISBN: 978-0-7345-0453-1 Developing jungle perch fingerling production to improve fishing opportunities Project No. 2012/213 March 2016 Ownership of Intellectual property rights Unless otherwise noted, copyright (and any other intellectual property rights, if any) in this publication is owned by the Fisheries Research and Development Corporation, Department of Agriculture and Fisheries (Queensland) and James Cook University. This publication (and any information sourced from it) should be attributed to – Hutchison, M., Lee, P., Norris, A., Nixon, D., Shorten, D., Borchert, T., Wang, S., Chilcott, K., Palmer, P., Marsden,T., Carton, G., and Kowitz, L. Developing jungle perch fingerling production to improve fishing opportunities. Bribie Island Research Centre, Woorim, Qld. July CCBY3.0 Creative Commons licence All material in this publication is licensed under a Creative Commons Attribution 3.0 Australia Licence, save for content supplied by third parties, logos and the Commonwealth Coat of Arms. Creative Commons Attribution 3.0 Australia Licence is a standard form licence agreement that allows you to copy, distribute, transmit and adapt this publication provided you attribute the work. A summary of the licence terms is available from creativecommons.org/licenses/by/3.0/au/deed.en. The full licence terms are available from creativecommons.org/licenses/by/3.0/au/legalcode. Inquiries regarding the licence and any use of this document should be sent to: [email protected] Disclaimer The authors do not warrant that the information in this document is free from errors or omissions. The authors do not accept any form of liability, be it contractual, tortious, or otherwise, for the contents of this document or for any consequences arising from its use or any reliance placed upon it. The information, opinions and advice contained in this document may not relate, or be relevant, to a reader’s particular circumstance. Opinions expressed by the authors are the individual opinions expressed by those persons and are not necessarily those of the publisher, research provider or the FRDC. The Fisheries Research and Development Corporation plans, invests in and manages fisheries research and development throughout Australia. It is a statutory authority within the portfolio of the federal Minister for Agriculture, Fisheries and Forestry, jointly funded by the Australian Government and the fishing industry. Researcher Contact Details FRDC Contact Details M Name Michael Hutchison Address: 25 Geils Court Address DAF Bribie Island Research Centre, Deakin ACT 2600 PO Box 2066, Woorim Qld 4507 Phone: 02 6285 0400 Phone 07 3400 2037 Fax: 02 6285 0499 Fax 07 3408 3535 Email: [email protected] E-mail [email protected] Web: www.frdc.com.au In submitting this report, the researcher has agreed to FRDC publishing this material in its edited form. i Contents Tables ...................................................................................................................................................... v Figures .................................................................................................................................................. vii Acknowledgments ................................................................................................................................. ix Abbreviations ........................................................................................................................................ ix Executive Summary............................................................................................................................... x Introduction ........................................................................................................................................... 1 References ......................................................................................................................................... 3 Objectives ............................................................................................................................................... 4 Chapter 1: Spawning, egg management, egg quality and embryological development ................. 5 Summary ........................................................................................................................................... 5 Introduction ....................................................................................................................................... 6 Objectives ......................................................................................................................................... 8 Methods............................................................................................................................................. 9 Broodstock collection ................................................................................................................. 9 Broodstock management and feeding regime ............................................................................ 9 Spawning induction .................................................................................................................. 11 Spawning tank set up and egg collection ................................................................................. 12 Counting eggs and evaluating fertilisation rates....................................................................... 13 General egg management ......................................................................................................... 14 Determining hatch rates ............................................................................................................ 15 Evaluating effect of salinity on egg buoyancy and hatch rate .................................................. 15 Evaluating egg quality .............................................................................................................. 16 Embryological development ..................................................................................................... 18 Assessing effectiveness of iodine treatment of eggs ................................................................ 18 Statistical analyses .................................................................................................................... 19 Results ............................................................................................................................................. 20 Latency times and fertilisation rates ......................................................................................... 20 Effects of salinity on egg buoyancy and hatch rate .................................................................. 21 Egg morphometry with reference to broodstock characteristics and spawning ....................... 25 Biochemical composition of eggs ............................................................................................ 28 Embryological development ..................................................................................................... 32 Iodine treatment of eggs ........................................................................................................... 36 Discussion ....................................................................................................................................... 36 Latency times and fertilisation rates ......................................................................................... 36 Effects of salinity on egg buoyancy and hatch rates ................................................................ 37 Egg morphometry and quality .................................................................................................. 38 Biochemical composition of eggs ............................................................................................ 39 Embryonic development ........................................................................................................... 43 Treating eggs with iodine ......................................................................................................... 44 References ....................................................................................................................................... 44 Chapter 2: Optimising larval and juvenile rearing ......................................................................... 53 Summary ......................................................................................................................................... 53 Introduction ..................................................................................................................................... 54 Objectives ....................................................................................................................................... 57 ii Methods........................................................................................................................................... 57 Broodstock management, spawning, egg collection and incubation ........................................ 57 Live feed production ...............................................................................................................